totman



(No Model.) v 2 Sheets-Sheet 1,

J. H. TOTMAN.

MACHINE FOR SHARPENING AND GUMMING SAWS.

No. 324,4 QL4- A khan/ML,

w M mw NA PETERS, Phulvlitmgnplur. Walhngtun. D. C-

(No Model.) 2 sheets-sheet 2.

J.VH. TOTMAN.

MACHINE PoR SHARPENING AND GUMMING sAWs.

No. 324,434. Patented Aug.,18, 1885.

y XW #Wav/z N. Ferias. mawumogmpmr. wnshingm. n c.

UNITED STATES PATENT EEICE'.

JAMES H. ToTMAN, or DEsERoN'ro, ONTARIO, CANADA.

MACHINE FoR SVHARPE'NING AND GUMMING sAws.

SPECIFICATION forming part of Letters Patent No. 324,434, dated August 18, 1885.

Applicafionfiled November 24, i894. (No model.)

To @ZZ whom, t may concerne Be it known that I, JAMES H. ToTMAN, of Deseronto, in the Province of Ontario, in thel Dominion of Canada, have inventednew and useful Improvements in Machines for Gum ming and Sharpening vCircular Saws, (for which I have obtained a patent in Canada, No. 20,574, bearing date December 19, 1884,) of which the following is a specification.

My invention relates to apparatus for gumming and sharpening circular saws by means of emcry-wheels.

rIhe object of my invention is the construction of a machine for gumming, sharpening.

:and jonting in a iinished manner and wit-hout injury to health circular saws uniformly and expeditiously, giving any desired pitch, angle, or hook to the teeth, and also any desired bevel.

Figure 1 is a side elevation of my improved machine. Fig. 2 is a front elevation of the same. Fig. 3 is a rear elevation. Fig. 4 is a top view. Fig. 5 is a detail of pivot of the post. Fig. 6 is a perspective view of the machine.

by set-screw c upon a tie-rod, A', the ends of which pass through the frame ends and are secured by nuts a". The post P is cranked sidewise near the top at p, to clear the emerywheel WV, and :is furnished with a cross-bar, C, which is slotted longitudinally and adapted to receive a slide-block, T, carrying the saw-arbor T', upon which the circular saw is secured by a collar, T, and set-screw t, so as to be easily turned by hand. The cross-bar is held upon the post by a collar,'c, provided with a set-screw, c-, and may be raised or lowered to any desired position to suit the different diameters of saws by a screw, Q, passing through a lug in the cross-bar C, and journaled within the post P, said screw being capable of being actuated by means of a handle, Q, jour- Paienied in Canada Decembir I9, 1984, No.20,754. s

nailed to the post and carrying a miter-wheel,

q, gearing in armiter wheel, q", fast upon the screw Q. Forgreater convenience, two crossbars, vsimilar to C, may be provided to avoid traversing vthe same great distances when changing from large saws to small, or vice versa. The post is semicireulanin cross-section, and has a tlat foot, P', with a semicircular pivot, p', turning in a step in the base-plate, the front hall' or three-quarters of said step being out away and the pivot held thereinby a pin, p", engaging a semicircular groove, 22"', in the face ofthe foot concentric with the pivot p. The center of the pivot-p is lineable with the center ofthe journal at the top, the center line passing through the diameter of the einery-wheel and through the plane of the saw, the front portion ofthe pivot and bearing being cut away to allow large saws to project past thesame. The angle of the post P, to obtain the desired bevel of the cutting-faces ofthe saw-teeth, is controlled by means of the lever P, secured to the upper end of thejournal by two screws or pins, 11", in such manner that the lever will turn the post, but have a lslight vertical swivel motion to allow the tail end of the lever to engage or disengage notches in a segment, A, secured upon the frame A, and thus tix the position of the post, which may be turned through an angle of ninety degrees.

W is the emery-wheel secured upon a shaft, W, having a pulley, V. and being journaled in a swing-frame, Y, which is forked in front and rear, the front ends formed into bearings y for the shaft VV, and the rear ends into hubs y', secured by set-screws r upon the rocking shaft R. The latter is journaled at the rear of the frame, and carries between the hubs y the stepped cone-pulley R', with the pulley R, driving the pulley V upon the emerywheel shaft, the hubs of said pulleys forming a sleeve, R, rotating yupon the said rocking shaft. The"vertical motion of the swing frame Y, and with it the height of the einerywheel W, is controlled by a counterbalanced lever, L, with a balance-weight, L', secured upon a rocking shaft, L, and connected to the swing-frame Y by a link, Z. The rear end of the lever L moves loosely in a guide, Z, limiting its vertical movement.

IOO

F is a fan placed in the upper portion of the frame, and having its suction-mouth F extended forward to partly incase the emerywheel, and forming a casing, F, for the same, the latter being secured to the post l? by means ol a bolt, f, passing through the upper journal of the same. The fan F exhausts the cas! ing F, thereby drawing away all particles of steel and einery which are being liberated when the emery-wheel is operating upon a saw and discharges the same through a pipe F.

D is the drivinglshal't journaled below at the rear ot' the fame. It is provided with fast and loose drivingpullcys D", a conepulley, D', driving` the upper conepulley, R', and with a pulley, D, to drive the fan.

It will be noticed that my improved construction provides for the emery-wheel always rotating in the same vertical plane, the desired angle and bevel of the teeth being ob tained by the angular adjustment. ot' the post l by the lever P and the lateral adjustment ot' the slide T on the crosSAbar C; that the plane ot' the center line ot" the einery-wheel shat't XV always passes through a vertical line drawn through the saw at the operatingpoint; that saws so large as to project below the base plate may be operated upon, and that the operation is t'ree from danger otinhaling particles of steel and cmeryall points of importance in tl ilclass of machinery.

l claim as my inventionl. A machine for gnniming and sharpening saws, consisting ot' the combination ot' the frame-work A AB B' E, driving-shalt D, fast and loose pulleys D, fanpulley D, eonepulleys D and R', sleeved loose pulley R, rocking shalt R, swing-frame Y, having t'orkarms y', secured by set screws, emery-wheel shaft W, with pulley \V, and emery-wheel YV, counterbalunced lever L, shaft L, and

link Z, the post P, screw Q, handle Q', and connecting mitergear, cross-bar C, with crosss1ide,saw-arbor T', lever P'. pins 19, notched segment A, fan F, discharge-tube F, suctionniouth and guard F F, and boltf.

2. The post P, cranked at p, in combination with the lever P, pins 11, dat foot P, semicircular pivot p', quadrantal step, pin p", semicircular groove 19', screw Q, m'tcrfgear q q', handle Q', and cross bar C.

3. The cranked post P, having lat foot P', with semicircular pivot p', in combination with a step in the bed-plate B, having the front `half or thrcequarters cut away, pin p, and semicircular groove 12 concentric with the pivot p.

4. The cranked post P, in combination with the triangular frame A, wheel-guard F', and bolt f.

5. The longitudinally-slotted crossvbar C, in combination with the slide block T, adapted to receive saw-arbor T, screw Q, mil'er wheels q q', and handle Q.

6. The combination of the drivingshaft D, the rocking shaft R, emery'wheel shaft W, swing-frame Y, and fan F.

7. The combination ofthe drivingshaft D, cone'pulley D', rocking shaft R, sleeved loose cone-pulley R R, the hubs ofthe swingt` rame Y, emery-wheel shat't XV, and pulley W.

8. lu combination with an einery-wheel,\V, shaft W', swingtrame Y, and counterbalaneed lever L, the fan F, suction-mouth and guard F F', the suspcnsioirboltf, the upper jou rnal of post P, and discharge-tube Fm.

Signed at Deseronto, Ontario, this 14th day of October, 1884.

JAMES H. TOT'MAN. ln presence of- E.. W. RATHBUN, E. ARTHUR RIKEN. 

